21374716 has 24 divisors (see below), whose sum is σ = 40924800. Its totient is φ = 9687600.

The previous prime is 21374713. The next prime is 21374723. The reversal of 21374716 is 61747312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21374713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25951 + ... + 26761.

It is an arithmetic number, because the mean of its divisors is an integer number (1705200).

Almost surely, 2^21374716 is an apocalyptic number.

It is an amenable number.

21374716 is a deficient number, since it is larger than the sum of its proper divisors (19550084).

21374716 is a wasteful number, since it uses less digits than its factorization.

21374716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425 (or 1423 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 21374716 is about 4623.2797882023. The cubic root of 21374716 is about 277.5237260238.

The spelling of 21374716 in words is "twenty-one million, three hundred seventy-four thousand, seven hundred sixteen".